$.fn.disableOnSubmit = function(disableList){
	
	if(disableList == null){var $list = 'input[type=submit],input[type=button],input[type=reset],button';}
	else{var $list = disableList;}
	
	// Makes sure button is enabled at start
	$(this).find($list).removeAttr('disabled');
	
	$(this).submit(function(){$(this).find($list).attr('disabled','disabled');});
	return this;
};

//function toggleLayer(whichLayer) {
//  var elem, vis;
//  if(document.getElementById) // this is the way the standards work
//    elem = document.getElementById(whichLayer);
//  else if(document.all) // this is the way old msie versions work
//      elem = document.all[whichLayer];
//  else if(document.layers) // this is the way nn4 works
//    elem = document.layers[whichLayer];
//  vis = elem.style;
  // if the style.display value is blank we try to figure it out here
//  if(vis.display==''&&elem.offsetWidth!=undefined&&elem.offsetHeight!=undefined)
//    vis.display = (elem.offsetWidth!=0&&elem.offsetHeight!=0)?'block':'none';
//  vis.display = (vis.display==''||vis.display=='block')?'none':'block';
//}


function ritornos(v){
		if(v=="si"){
			document.getElementById("ritornosino").style.display="block";
		}else{
			document.getElementById("ritornosino").style.display="none";
		}
	}